Adapter for detonating fuses or instantaneous matches



July 2,.1929. v R MALLET 1,719,065

ADAPTER FOR DETONATING FUSES OR INSTANTANEOUS MATCHES Filed Sept. 21, 1928 I ATTORNEYS.

Patented July 2, 1929.

* UNITED; STATES;

, rennan MALLE or items,

FRANOE, assreu'on To ini s eiv 3103115111), ct;,j ssj ,SIMSBURY, oounnorrourg ADAPTER FOR momma rusEs 0R msmn'nmnnousMATCnnsf Application filed September 21, i928, Serial No. 307,524, at i France September 23, 1927. I V

Adapters for detonating fuses or instan taneousmatches have already been proposed in which a block of explosive of the same or like nature as that contamed 1n the detonate ing fuse or instantaneous match is comintroduced the ends of detonating, fuses leading to the taneously. V

. The adapters thus formed require more explosive material than is strictly necessary. Also, they offer an insuflicient resistance to shocks sustained while handling, forexample, from falls. ".Again', since the holes must be made larger than the priming and the 'det onating fuses so that they can pass easilyinto theholes there is a risk that the priming, extended as it is, the match and the detonating fuses will not remain in their corresponding holes. The result may bethat either the charge or some of the blasts do not explode. The present invention has for its object an adapter of this type, but which does notpres sent the above disadvantages. The quantity of explosive which constitutes it, is reduced to the strict minimum comp atible with a good transmission of the explosion to the difierent fuses or instantaneous matches .which are there united and with the requisite strength of the adapter to resist shocks. In addition, according to one form of the invention, the adapter is protected efficiently against humidity as well as against shocks. Finally, according to another form it is provided with simple and efficient means for ensuring the retention of the priming and of the ends of the fuses in the holes.

The advantages mentionedabove are obtained in the present invention by making the holes in opposite faces so'that the inner mine holes to be exploded simulends of the holes in one face extend in an axial directionv beyond the corresponding ends of the holes in the other face.

According to a modification the block of explosive is enclosed in a metal sheet which is clamped or soldered forming a sort of double bottomed box, holes being pierced in this bottom corresponding to holes provided in the block of explosive. Washers of paper, gummed cloth or other equivalent substances capable of being easily torn away can be applied so asltemporarily' to stop the holes:

Finally, the edges of the holes in the bottoms of the metallic envelope may be provided with small points or small hooks directed inwardly 7 so as to secure-the priming or the fuses introduced into the holes. f j

I The accompanying drawings represent by way of 'example,' various forms of the inven+ tion. In these drawings: I Figure l is a diametric section through A VA of Fig. 2"of one form. Fig. 2 is a plan view looking down on Fig. 1. .riggs-isa diametric section through B-Bbf Fig.

Fig. 4: is a plan view from above of Fig. i

Fig. 5 is a diametric section of another form. A's shown in Flg. l the'adapter is composed of a cylindrical block'of compressed explosive 1 which has at one'end a'central hole 2 and I a'series of holes 3f(in"this case three holes), arranged round the hole '2. On the other the 'holes 3' arethnae other holes .4. The holes are preferably separated 1 by an equal angu lar distance on each face." Thus atthe ends of the adapter which are'the most delicate parts, there is" amaximum thickness'ofxexs plosive between the var-ious'holes. Also by arranging the holes of one face fwitli respect to the holes inthe other face so that the inner ends of the holes extendbeyond one another the necessary amount of explosive isre'duced.

off without leaving portions thereof so as to uncover the holes 2,3 and 4 for use. This washer maycomprise alug for detaching,

In orderto retain the priming and also the ends of detonating fuses in the adapter, there are preferably. provided on the edges of the holes in the bottoms 6 and 7 small points or hooks, such'as 10. These hooks will catch the priming and will on the other hand enter the soft metallic envelope of the detonating fuse or of the instantaneous match, thus holding, once the priming and the ends of fuses. or of matches have been placed in the adapter.

. a face and arranged lnstaggered relation to a 1'5 with retaining. devices as 2 I .f' 7 I a I 1,719,065

that the fuses or the priming should not be disengaged from the adapter, but that they should, as far as possible,touch*the bottom of the holes at the moment-When the explo-.

sion of the adapter takes place. a

In order to makethe adaptenfnlly dampproof Wlt-hOIlt hating tosolder the bottoms Land 8 9 t e r enee th ju t on. be: tirse thejh t-tom eerh heen lQPe may e sere edbyQhafifiermn vba fi i one milar e er l; sisisheirninF g?- ,i

" are. 9 76561 v .d n enii hen iti M 11-; Eigsifiqandgl permits-le ,apr ;ree ble ecenemy i u 7 1: i e eet n s me e fifh s mp d wi h known adapters, In faoqitis easy to ar- Eeeseit with-it eei'fer ra le t e w liae i ae se .nt t 1 s at r which 1 neh e th ;i n ienqebfi th dapt an th h e s t t 'egmade wi hv t m l s What I; claim is;

a i aad a r; teas n fuels 1 ntene 1 s t h s een ist es a bl o eem pressed explosiye material haying holes heedne th sa d o k om eppe te r said holesbeingadapted to receive the prim.- is effl emetchfer e ee i e he-ends ei therde e atin i f s n tan n o s matches for discharging blasting material, a

the holes in one face being arranged in staggeredrelatlonto those in the other, and a metal casing enclosing the block, said casing fbeingpierced with holes corresponding to those in the block.

4L" Adapter'for detonatin'g fuses or instantaneons matches conslsting of a block of compressed explosive material having holes bored into the said block from opposite faces, said holes being adapted to receive the priming of 'the match for detonating and the ends of the detonating fuses orinsta-ntaneons matches for discharging blasting material, the holes in on e facebeing arranged in staggered relation t-othose in the other and the inner endsof the holes in the one face of the block extend ing beyond the inner ends of the holes in the other face, and a metal casing enclosing the bloclg said casing being pierced with holes corresponding to those in the block.

5. Inan adapter as claimed in claim 3 the provision on the edges of the holes in: the metal casinglof'fnse retainingmeans.

:6, In anafdaptcr as claimed in claim 4 the proyision on the edges of the holes in the metal casing ofifuse retaining means, a

In an adapter as claimed in claim 3 wherein the edges of theeholes in the metal casing are provided with fuse retaining means, a'removable flexible cover forprotecting the holes in the casing. I

8 In an adapter as claimed in claim 4 wherein the edges of the holes in the metal casing ;ar.e provided with fuse retaining means,- a removable flexible cover for protectingjthe holes 'inthe casing. f

9'. In an adapter 'asclaimed in claim 3 the provision ofa damp-proof protectorfadapted to cover the joints in the casing.

l lOJInaniadapter asclaimed in claim 4:

the provisionfof a damp hroof protect-or adapted to cover the joints in the casing.

.In testimony whereof I have signed this specification. I I N i RICHARD MALLE T. 

